美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose

首先需要引用 js 和css

1 <!--上传控件-->2     <script src="query.form.min.js"></script>3     <link href="Img_List.css" rel="stylesheet" />4     <script src="Img_List.js"></script>

Img_List.js 如下：

 1 /// <reference path="../../script/jquery-1.8.0.min.js" /> 2 //显示 3 function imgshow(obj) { 4     //$(obj).find("a").show(); 5 } 6  7 //隐藏 8 function imghide(obj) { 9     //$(obj).find("a").hide();10 }11 12 //上传13 function upload() { 14     $("#FileLoad").click();15 }16 17 //删除18 function imgdel(listId, FileId, hfId) {19     20     $.post("/CommonModule/ashx/public.ashx?action=DelMessageImg&Files=" + $("#" + hfId).val(), function (result) {21         if (result != "ok")22             $.messager.alert("消息提示", "删除失败!");23      });24     var html = "<li><img  src=\"/Themes/Images/jia.jpg\" style=\"height: 80px; width: 80px;\" / alt="美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose" ><input type=\"file\" id=\""+FileId+"\" class=\"input\" onchange=\"ImgUpload('"+FileId+"','"+hfId+"','"+listId+"');\" name=\""+FileId+"\" /></li>"25     $("#"+listId).html(html);26 }27 28 //添加成功29 function imgaddhtml(data, code,listId,fileId,hfId) {30     var list = data.split(',');31     var html = "<li onmouseover=\"imgshow(this)\" onmouseout=\"imghide(this);\">";32     html += "<a style=\"height:80px;width:80px;\" href=\"" + list[0] + "\" target=\"_blank\"><img  src=\"" + list[0] + "\" imgs=\"" + list[0] + "\" code=\"" + code + "\" / alt="美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose" ></a><span  onclick=\"imgdel('"+listId+"','"+fileId+"','"+hfId+"')\"></span></li>";33     $("#" + listId).html(html);34 }35 36 //图片文件上传37 //uppath 上传空间id 38 //上传成功存放的图片路径的隐藏域id39 //listId 显示图片的区域id40 function ImgUpload(uppath, hndimg,listId) {41     var sendUrl = "/CommonModule/ashx/Upload_Ajax.ashx?action=SingleFile&IsThumbnail=1&UpFilePath=" + uppath;42     //开始提交43     $("#form1").ajaxSubmit({44         beforeSubmit: function (formData, jqForm, options) {45             //alert(1);46         },47         success: function (data, textStatus) {48             var list = $("#" + hndimg).val();49             $("#" + hndimg).val(data.msgbox);50             imgaddhtml(data.msgbox, 0,listId,uppath,hndimg);51         },52         error: function (data, status, e) {53             alert("上传失败！");54         },55         url: sendUrl,56         type: "post",57         dataType: "json",58         timeout: 60000059     });60 };

Img_List.css 如下：

1 .img_list{ margin:0px; padding:0px;  overflow:hidden;}2 .img_list ul,.img_list ul li{ margin:0px; padding:0px;} 3 .img_list ul li{ float:left; list-style:none; position:relative; margin:5px 0px 0px 5px;}4 .img_list ul li span5 { position:absolute;top:3px; right:3px; width: 16px; height: 16px; opacity: 0.6;filter: alpha(opacity=60); margin: 0 0 0 2px;6 vertical-align: top; background: url('/Themes/Images/panel_tools.png') no-repeat -16px 0px;}7 .img_list ul li img{ width:80px; height:80px; cursor:pointer; position:relative; z-index:0;}8 .img_list ul li .input{ width:80px; height:80px; cursor:pointer; position:relative; left:-100px;vertical-align: top; margin:0px; padding:0px; opacity:0;filter: alpha(opacity=0); }

panel_tools.png 如下：

jia.jpg 如下：

以上素材引用完成后 再看 前台页面代码：

 1 <tr> 2                         <th>图片1：</th> 3                         <td> 4                             <asp:Literal ID="ltrimg_list" runat="server"></asp:Literal> 5                             <input type="hidden" runat="server" id="ImgPath" name="ImgPath" /> 6                             <span   style="max-width:90%">建议尺寸(243*150)</span> 7                         </td> 8                     </tr> 9 10 <tr>11                         <th>图片2：</th>12                         <td>13                             <asp:Literal ID="Literal1" runat="server"></asp:Literal>14                           15                             <input type="hidden" runat="server" id="hkImgPath" name="hkImgPath" />16                              <span style="color:blue;">建议尺寸(243*150)</span>17                         </td>18                     </tr>

后台页面代码 （初始化控件） ：

 1  protected void Page_Load(object sender, EventArgs e) 2         { 3            4             if (!IsPostBack) 5             { 6                ltrimg_list.Text = UpLoad.showUploadFile("File1", "ImgPath", mfmodel.ImgPath, "img_list1"); 7                 Literal1.Text = UpLoad.showUploadFile("File2", "hkImgPath", mfmodel.hkImgPath, "img_list2"); 8                     9             }10         }

生成上传控件方法

 1   /// <summary> 2         /// 生成一个上传插件信息 3         /// </summary> 4         /// <param name="fileId">上传控件id</param> 5         /// <param name="hfId">隐藏域id用来保存上传的图片路径</param> 6         /// <param name="imgUrl">初始化显示的图片地址</param> 7         /// <param name="listId">上传成功之后用来显示上传图片的标签id</param> 8         /// <returns></returns> 9         public static string showUploadFile(string fileId, string hfId, string imgUrl, string listId)10         {11             string result = "";12             if (!string.IsNullOrEmpty(imgUrl))13             {14                 result = "<div class=\"img_list\"><ul id=\"" + listId + "\"><li onmouseover=\"imgshow(this)\" onmouseout=\"imghide(this);\"><a style=\"height:80px;width:80px;\" href=\"" + imgUrl + "\" target=\"_blank\"><img  src=\"" + imgUrl + "\" imgs=\"" + imgUrl + "\" code=\"0\" / alt="美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose" ></a><span onclick=\"imgdel('" + listId + "','" + fileId + "','" + hfId + "')\"></span></li></ul></div>";15             }16             else17             {18                 result = "<div class=\"img_list\"><ul id=\"" + listId + "\"><li><img  src=\"/Themes/Images/jia.jpg\" style=\"height: 80px; width: 80px;\" / alt="美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose" ><input type=\"file\" id=\"" + fileId + "\"class=\"input\" onchange=\"ImgUpload('" + fileId + "','" + hfId + "','" + listId + "')\" name=\"" + fileId + "\" /></li></ul></div>";19             }20 21             return result;22         }

上传文件的方法ashx:

  1 using System;  2 using System.Collections;  3 using System.Collections.Generic;  4 using System.IO;  5 using System.Linq;  6 using System.Text.RegularExpressions;  7 using System.Web;  8 using DotNet.Kernel.Common;  9 using DotNet.Utilities; 10 using LitJson; 11  12 namespace BPMS.WEB.Admin.ashx 13 { 14     /// <summary> 15     /// Upload_Ajax 的摘要说明 16     /// </summary> 17     public class Upload_Ajax : IHttpHandler 18     { 19  20         public void ProcessRequest(HttpContext context) 21         { 22             //取得处事类型 23             string action = context.Request.QueryString["action"]; 24  25             switch (action) 26             { 27                 case "SingleFile": //单文件 28                     SingleFile(context); 29                     break; 30                 case "MultipleFile": //多文件 31                     MultipleFile(context); 32                     break; 33                 case "AttachFile": //附件 34                     AttachFile(context); 35                     break; 36                 case "EditorFile": //编辑器文件 37                     EditorFile(context); 38                     break; 39  40             } 41         } 42  43  44  45         #region 上传单文件处理=================================== 46         private void SingleFile(HttpContext context) 47         { 48  49             string _refilepath = context.Request.QueryString["ReFilePath"]; //取得返回的对象名称 50             string _upfilepath = context.Request.QueryString["UpFilePath"]; //取得上传的对象名称 51             string _delfile = context.Request.QueryString[_refilepath]; 52             HttpPostedFile _upfile = null; 53             try 54             { 55                 _upfile = context.Request.Files[_upfilepath]; 56             } 57             catch (Exception e) 58             { 59                 context.Response.Write("{\"msg\": \"0\", \"msgbox\": \"上传文件过大！\"}"); 60                 context.Response.End(); 61             } 62             bool _iswater = false; //默认不打水印 63             bool _isthumbnail = false; //默认不生成缩略图 64             bool _isimage = false; 65  66             if (context.Request.QueryString["IsWater"] == "1") 67                 _iswater = true; 68             if (context.Request.QueryString["IsThumbnail"] == "1") 69                 _isthumbnail = true; 70             if (context.Request.QueryString["IsImage"] == "1") 71                 _isimage = true; 72  73             if (_upfile == null) 74             { 75                 context.Response.Write("{\"msg\": \"0\", \"msgbox\": \"请选择要上传文件！\"}"); 76                 return; 77             } 78             UpLoad upFiles = new UpLoad(); 79             string msg = upFiles.fileSaveAs(_upfile, _isthumbnail, _iswater, _isimage); 80             //删除已存在的旧文件 81             Utils.DeleteUpFile(_delfile); 82             //返回成功信息 83             context.Response.Write(msg); 84  85             context.Response.End(); 86         } 87         #endregion 88  89         #region 上传多文件处理=================================== 90         private void MultipleFile(HttpContext context) 91         { 92             string _upfilepath = context.Request.QueryString["UpFilePath"]; //取得上传的对象名称 93             HttpPostedFile _upfile = context.Request.Files[_upfilepath]; 94             bool _iswater = false; //默认不打水印 95             bool _isthumbnail = false; //默认不生成缩略图 96  97             if (context.Request.QueryString["IsWater"] == "1") 98                 _iswater = true; 99             if (context.Request.QueryString["IsThumbnail"] == "1")100                 _isthumbnail = true;101 102             if (_upfile == null)103             {104                 context.Response.Write("{\"msg\": \"0\", \"msgbox\": \"请选择要上传文件！\"}");105                 return;106             }107             UpLoad upFiles = new UpLoad();108             string msg = upFiles.fileSaveAs(_upfile, _isthumbnail, _iswater);109             //返回成功信息110             context.Response.Write(msg);111             context.Response.End();112         }113         #endregion114 115         #region 上传附件处理=====================================116         private void AttachFile(HttpContext context)117         {118             string _upfilepath = context.Request.QueryString["UpFilePath"]; //取得上传的对象名称119             HttpPostedFile _upfile = context.Request.Files[_upfilepath];120             bool _iswater = false; //默认不打水印121             bool _isthumbnail = false; //默认不生成缩略图122 123             if (_upfile == null)124             {125                 context.Response.Write("{\"msg\": \"0\", \"msgbox\": \"请选择要上传文件！\"}");126                 return;127             }128             UpLoad upFiles = new UpLoad();129             string msg = upFiles.fileSaveAs(_upfile, _isthumbnail, _iswater, false, true);130             //返回成功信息131             context.Response.Write(msg);132             context.Response.End();133         }134         #endregion135 136         #region 编辑器上传处理===================================137         private void EditorFile(HttpContext context)138         {139             bool _iswater = false; //默认不打水印140             if (context.Request.QueryString["IsWater"] == "1")141                 _iswater = true;142             HttpPostedFile imgFile = context.Request.Files["imgFile"];143             if (imgFile == null)144             {145                 showError(context, "请选择要上传文件！");146                 return;147             }148             UpLoad upFiles = new UpLoad();149             string remsg = upFiles.fileSaveAs(imgFile, false, _iswater);150             //string pattern = @"^{\s*msg:\s*(.*)\s*,\s*msgbox:\s*\""(.*)\""\s*}$"; //键名前和键值前后都允许出现空白字符151             string pattern = @"^{\s*\""msg\"":\s*\""(.*)\""\s*,\s*\""msgbox\"":\s*\""(.*)\""\s*}$"; //键名前和键值前后都允许出现空白字符152             Regex r = new Regex(pattern, RegexOptions.IgnoreCase); //正则表达式实例，不区分大小写153             Match m = r.Match(remsg); //搜索匹配项154             string msg = m.Groups[1].Value; //msg的值，正则表达式中第1个圆括号捕获的值155             string msgbox = m.Groups[2].Value; //msgbox的值，正则表达式中第2个圆括号捕获的值 156             if (msg == "0")157             {158                 showError(context, msgbox);159                 return;160             }161             Hashtable hash = new Hashtable();162             hash["error"] = 0;163             hash["url"] = msgbox;164             context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");165 166             string result = JsonMapper.ToJson(hash);167             //result = result.Replace("[","");168             //result = result.Replace("]", "");169             context.Response.Write(result);170             171            context.Response.End();172 173         }174         //显示错误175         private void showError(HttpContext context, string message)176         {177             Hashtable hash = new Hashtable();178             hash["error"] = 1;179             hash["message"] = message;180             context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");181             context.Response.Write(JsonMapper.ToJson(hash));182             context.Response.End();183         }184         #endregion185 186 187 188         #region Helper189         public class NameSorter : IComparer190         {191             public int Compare(object x, object y)192             {193                 if (x == null && y == null)194                 {195                     return 0;196                 }197                 if (x == null)198                 {199                     return -1;200                 }201                 if (y == null)202                 {203                     return 1;204                 }205                 FileInfo xInfo = new FileInfo(x.ToString());206                 FileInfo yInfo = new FileInfo(y.ToString());207 208                 return xInfo.FullName.CompareTo(yInfo.FullName);209             }210         }211 212         public class SizeSorter : IComparer213         {214             public int Compare(object x, object y)215             {216                 if (x == null && y == null)217                 {218                     return 0;219                 }220                 if (x == null)221                 {222                     return -1;223                 }224                 if (y == null)225                 {226                     return 1;227                 }228                 FileInfo xInfo = new FileInfo(x.ToString());229                 FileInfo yInfo = new FileInfo(y.ToString());230 231                 return xInfo.Length.CompareTo(yInfo.Length);232             }233         }234 235         public class TypeSorter : IComparer236         {237             public int Compare(object x, object y)238             {239                 if (x == null && y == null)240                 {241                     return 0;242                 }243                 if (x == null)244                 {245                     return -1;246                 }247                 if (y == null)248                 {249                     return 1;250                 }251                 FileInfo xInfo = new FileInfo(x.ToString());252                 FileInfo yInfo = new FileInfo(y.ToString());253 254                 return xInfo.Extension.CompareTo(yInfo.Extension);255             }256         }257 258         #endregion259 260         public bool IsReusable261         {262             get263             {264                 return false;265             }266         }267     }268 }

  1 using System;  2 using System.Collections;  3 using System.Collections.Generic;  4 using System.IO;  5 using System.Linq;  6 using System.Web;  7 using DotNet.Kernel.Common;  8   9 namespace BPMS.WEB 10 { 11     public class UpLoad 12     { 13         public UpLoad() 14         { 15  16         } 17         /// <summary> 18         /// 生成一个上传插件信息 19         /// </summary> 20         /// <param name="fileId">上传控件id</param> 21         /// <param name="hfId">隐藏域id用来保存上传的图片路径</param> 22         /// <param name="imgUrl">初始化显示的图片地址</param> 23         /// <param name="listId">上传成功之后用来显示上传图片的标签id</param> 24         /// <returns></returns> 25         public static string showUploadFile(string fileId, string hfId, string imgUrl, string listId) 26         { 27             string result = ""; 28             if (!string.IsNullOrEmpty(imgUrl)) 29             { 30                 result = "<div class=\"img_list\"><ul id=\"" + listId + "\"><li onmouseover=\"imgshow(this)\" onmouseout=\"imghide(this);\"><a style=\"height:80px;width:80px;\" href=\"" + imgUrl + "\" target=\"_blank\"><img  src=\"" + imgUrl + "\" imgs=\"" + imgUrl + "\" code=\"0\" / alt="美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose" ></a><span onclick=\"imgdel('" + listId + "','" + fileId + "','" + hfId + "')\"></span></li></ul></div>"; 31             } 32             else 33             { 34                 result = "<div class=\"img_list\"><ul id=\"" + listId + "\"><li><img  src=\"/Themes/Images/jia.jpg\" style=\"height: 80px; width: 80px;\" / alt="美观的单张上传控件 一个页面可以实例化多个_html/css_WEB-ITnose" ><input type=\"file\" id=\"" + fileId + "\"class=\"input\" onchange=\"ImgUpload('" + fileId + "','" + hfId + "','" + listId + "')\" name=\"" + fileId + "\" /></li></ul></div>"; 35             } 36  37             return result; 38         } 39         #region 40         /// <summary> 41         /// 裁剪图片并保存 42         /// </summary> 43         public bool cropSaveAs(string fileName, string newFileName, int maxWidth, int maxHeight, int cropWidth, int cropHeight, int X, int Y) 44         { 45             string fileExt = Utils.GetFileExt(fileName); //文件扩展名，不含“.” 46             if (!IsImage(fileExt)) 47             { 48                 return false; 49             } 50             string newFileDir = Utils.GetMapPath(newFileName.Substring(0, newFileName.LastIndexOf(@"/") + 1)); 51             //检查是否有该路径，没有则创建 52             if (!Directory.Exists(newFileDir)) 53             { 54                 Directory.CreateDirectory(newFileDir); 55             } 56             try 57             { 58                 string fileFullPath = Utils.GetMapPath(fileName); 59                 string toFileFullPath = Utils.GetMapPath(newFileName); 60                 return Thumbnail.MakeThumbnailImage(fileFullPath, toFileFullPath, 180, 180, cropWidth, cropHeight, X, Y); 61             } 62             catch 63             { 64                 return false; 65             } 66         } 67  68         /// <summary> 69         /// 文件上传方法A 70         /// </summary> 71         /// <param name="postedFile">文件流</param> 72         /// <param name="isThumbnail">是否生成缩略图</param> 73         /// <param name="isWater">是否打水印</param> 74         /// <returns>服务器文件路径</returns> 75         public string fileSaveAs(HttpPostedFile postedFile, bool isThumbnail, bool isWater) 76         { 77             return fileSaveAs(postedFile, isThumbnail, isWater, false, false); 78         } 79  80         /// <summary> 81         /// 文件上传方法B 82         /// </summary> 83         /// <param name="postedFile">文件流</param> 84         /// <param name="isThumbnail">是否生成缩略图</param> 85         /// <param name="isWater">是否打水印</param> 86         /// <param name="isImage">是否必须上传图片</param> 87         /// <returns>服务器文件路径</returns> 88         public string fileSaveAs(HttpPostedFile postedFile, bool isThumbnail, bool isWater, bool _isImage) 89         { 90             return fileSaveAs(postedFile, isThumbnail, isWater, _isImage, false); 91         } 92  93         /// <summary> 94         /// 文件上传方法C 95         /// </summary> 96         /// <param name="postedFile">文件流</param> 97         /// <param name="isThumbnail">是否生成缩略图</param> 98         /// <param name="isWater">是否打水印</param> 99         /// <param name="isReOriginal">是否返回文件原名称</param>100         /// <returns>服务器文件路径</returns>101         public string fileSaveAs(HttpPostedFile postedFile, bool isThumbnail, bool isWater, bool _isImage, bool _isReOriginal)102         {103             try104             {105                 string fileExt = Utils.GetFileExt(postedFile.FileName); //文件扩展名，不含“.”106                 string originalFileName = postedFile.FileName.Substring(postedFile.FileName.LastIndexOf(@"\") + 1); //取得文件原名107                 string fileName = Utils.GetRamCode() + "." + fileExt; //随机文件名108                 string dirPath = GetUpLoadPath(); //上传目录相对路径109 110                 //检查文件扩展名是否合法111                 if (!CheckFileExt(fileExt))112                 {113                     return "{\"msg\": \"0\", \"msgbox\": \"不允许上传" + fileExt + "类型的文件！\"}";114                 }115                 //检查是否必须上传图片116                 if (_isImage && !IsImage(fileExt))117                 {118                     return "{\"msg\": \"0\", \"msgbox\":  \"对不起，仅允许上传图片文件！\"}";119                 }120                 //检查文件大小是否合法121                 if (!CheckFileSize(fileExt, postedFile.ContentLength))122                 {123                     return "{\"msg\": \"0\", \"msgbox\":  \"文件超过限制的大小啦！\"}";124                 }125                 //获得要保存的文件路径126                 string serverFileName = dirPath + fileName;127                 string serverThumbnailFileName = dirPath + "small_" + fileName;128                 string returnFileName = serverFileName;129                 //物理完整路径                    130                 string toFileFullPath = Utils.GetMapPath(dirPath);131                 //检查有该路径是否就创建132                 if (!Directory.Exists(toFileFullPath))133                 {134                     Directory.CreateDirectory(toFileFullPath);135                 }136                 //保存文件137                 postedFile.SaveAs(toFileFullPath + fileName);138                 //如果是图片，检查图片尺寸是否超出限制139                 if (IsImage(fileExt))140                 {141                     Thumbnail.MakeThumbnailImage(toFileFullPath + fileName, toFileFullPath + fileName, 3000, 3000);142                 }143                 //是否生成缩略图144                 if (IsImage(fileExt) && isThumbnail)145                 {146                     Thumbnail.MakeThumbnailImage(toFileFullPath + fileName, toFileFullPath + "small_" + fileName, 150, 150, "R");147                    // returnFileName += "," + serverThumbnailFileName; //返回缩略图，以逗号分隔开148                 }149                 //是否打图片水印150                 if (IsWaterMark(fileExt) && isWater)151                 {152                     //switch (this.siteConfig.watermarktype)153                     //{154                     //    case 1:155                     //        WaterMark.AddImageSignText(serverFileName, serverFileName,156                     //            this.siteConfig.watermarktext, this.siteConfig.watermarkposition,157                     //            this.siteConfig.watermarkimgquality, this.siteConfig.watermarkfont, this.siteConfig.watermarkfontsize);158                     //        break;159                     //    case 2:160                     //        WaterMark.AddImageSignPic(serverFileName, serverFileName,161                     //            this.siteConfig.watermarkpic, this.siteConfig.watermarkposition,162                     //            this.siteConfig.watermarkimgquality, this.siteConfig.watermarktransparency);163                     //        break;164                     //}165                 }166                 //如果需要返回原文件名167                 if (_isReOriginal)168                 {169                     return "{\"msg\": \"1\", \"msgbox\": \"" + serverFileName + "\", mstitle: \"" + originalFileName + "\"}";170                 }171                 return "{\"msg\": \"1\", \"msgbox\": \"" + returnFileName + "\"}";172             }173             catch174             {175                 return "{\"msg\": \"0\", \"msgbox\":  \"上传过程中发生意外错误！\"}";176             }177         }178 179 180         #region 私有方法181 182         /// <summary>183         /// 返回上传目录相对路径184         /// </summary>185         /// <param name="fileName">上传文件名</param>186         private string GetUpLoadPath()187         {188             //string path = "/Files/upload/"; //站点目录+上传目录189             string path = "/upload/"; //站点目录+上传目录190             path += DateTime.Now.ToString("yyyyMM") + "/" + DateTime.Now.ToString("dd");191             return path + "/";192         }193 194         /// <summary>195         /// 是否需要打水印196         /// </summary>197         /// <param name="_fileExt">文件扩展名，不含“.”</param>198         private bool IsWaterMark(string _fileExt)199         {200             //判断是否开启水印201             if (1 == 1)202             {203                 //判断是否可以打水印的图片类型204                 ArrayList al = new ArrayList();205                 al.Add("bmp");206                 al.Add("jpeg");207                 al.Add("jpg");208                 al.Add("png");209                 if (al.Contains(_fileExt.ToLower()))210                 {211                     return true;212                 }213             }214             return false;215         }216 217         /// <summary>218         /// 是否为图片文件219         /// </summary>220         /// <param name="_fileExt">文件扩展名，不含“.”</param>221         private bool IsImage(string _fileExt)222         {223             ArrayList al = new ArrayList();224             al.Add("bmp");225             al.Add("jpeg");226             al.Add("jpg");227             al.Add("gif");228             al.Add("png");229             if (al.Contains(_fileExt.ToLower()))230             {231                 return true;232             }233             return false;234         }235 236         /// <summary>237         /// 检查是否为合法的上传文件238         /// </summary>239         private bool CheckFileExt(string _fileExt)240         {241             //检查危险文件242             string[] excExt = { "asp", "aspx", "php", "jsp", "htm", "html" };243             for (int i = 0; i < excExt.Length; i++)244             {245                 if (excExt[i].ToLower() == _fileExt.ToLower())246                 {247                     return false;248                 }249             }250             //检查合法文件251             string[] allowExt = { "gif", "jpg", "png", "bmp", "rar", "zip", "doc", "xls", "txt" };252             for (int i = 0; i < allowExt.Length; i++)253             {254                 if (allowExt[i].ToLower() == _fileExt.ToLower())255                 {256                     return true;257                 }258             }259             return false;260         }261 262         /// <summary>263         /// 检查文件大小是否合法264         /// </summary>265         /// <param name="_fileExt">文件扩展名，不含“.”</param>266         /// <param name="_fileSize">文件大小(KB)</param>267         private bool CheckFileSize(string _fileExt, int _fileSize)268         {269             //判断是否为图片文件270             if (IsImage(_fileExt))271             {272                 if (_fileSize > 10000 * 10240)273                 {274                     return false;275                 }276             }277             else278             {279                 if (_fileSize > 10000 * 10240)280                 {281                     return false;282                 }283             }284             return true;285         }286 287         #endregion288 289         #endregion290     }291 }